hutchins



UUUUUU S. eohanlcal T eeeeeee e.

2 Sheets-Sheet 2.

W. J. HUTCHINS. Mechanical Telephonet No. 228,817. Patented June15,1880.

N. PETERS, PNOTO-UTHOGRAPMR, WASNINGTON, D c.

i l i UNITED STATES PATENT OFFICEO WILLIAM J. HUTOHINS, OF J OLIET,ILLINOIS, ASSIGNOR TO HIWSELF AND THOMAS H. HUTOHINS, OF SAME PLAOE.

MECHANICAL TELEPHONE.

SPEGIFIGATION forming part of Letters Patent No. 228,81'7, dated June15, 1880.

Application filed February 9, 1880.

To all whom it may concem:

Be it known that I, WILLIAM J. HUroHINs, of the city of J oliet, inYVill county, and State of Illinois, have invented certain Improvementsin an Instrument for Oonveying the Sound of the Human Voice, commonlyknown as Telephones, the construction and operation of which I willexplain, reference being had to the annexed drawings, and the letters ioand figures thereon, making a part of this specification, in which-Figure lis a front external elevation Fig. 2, a` side view of a rubberinsulator; Fig. 8, perspective view of the wire insulated Fig. 4, a

front elevation of the interior working` parts; Fig. 5, a verticalsectional View on the line 3, Fig. 4.

This invention relates to certain improvements in that class ofinstruments whereby the sound of the human Voice is conducted from onediaphragm or sounding-board to another by a wire stretched taut, andalso in the construction and arrangement of the device to call andsignal the person to be addressed.

2 5 In the drawings, B is a case containing the working parts of theinstrument, having,` a circular Opening` in its face, inclosed by aflaring; month-piece, (shown at K, Fig. 5.) The case B is dividedhorizontally by a partition,c,Fig. 4,

a little below the center, the part above the partition i; being` thesounding-box, and the part below containing;` the uecessary machinery toring,` the call-bell P, Fig. 1, which call-bell is located on theoutside of the front part of 3 5 the case B below the month-piece K, asshown in Figs. l and 5, the knocker w reaching through the front of thecase under the bell to strike it, as shown in Fig. 5.

The sounding-box above the partition o is also divided Vertically fromside to side a little forward of the center, as is shown in Fig. 5, by aperforated partition, E, which perforated partition is of metal, and hasa circular opening,` in its center, into which is secured a band orcollar, k, projecting toward the front, as is shown in said Fig. 5.Across the front face or Opening made by said collark is stretched thediaphragm or sounding-board a, which diaphragm may be of metal or anyother suitable material, and securely attached to the 5o `outer edge ofthe collar k, as shown in Figzl.

The soulul-colulucting` wire D has a button, cs, secured to its frontend, to prevent its pulling through the diaphragm a, and, after passingthrough the center of the diaphragm a, passes at right angles with itout through an Opening,` at the back of the case, as shown in Fig. 5, toanother diaphragm in a similar instrument at its other end.

VVhen the wire D is stretched taut from one diaphragm to the other,words spoken by the human voice at the month-piece K may be distinctlyheard at the front of the diaphrag'm at its other end. The perforationsin the partition E serve to allow the sound at the rear of the diaphragma to rebound to the front and into the Opening,` at its front, so as toutilize all the sound possible.

VVhen conversing` with a person at the opposite end of the wire D theear-trumpet F, which is connccted to the sounding-box at its side, as isshown in Figs. l and 4, may be held to the ear, while conversation maybe carried 011 at the month-piece K, the hose A connecting' theear-trumpet F with the trumpet T in the sounding-box, as shown in Fig.4. By means of this hose A and ear-trumpet F the sound is much moreaudible than if the ear were held to the month-piece K. This hose A maybe connected to the sounding-box at any place, but preferably at theside, in front of the diaphragm (o.

The device to call is located at the rear of the diaphragm a, and iscomposed of the shaft i, bent up at right angles at its iuner end, andteri'ninating` in the crotch or fork S, while the outer end has a crank,o. This shaft rotates in a `jourual in the side of the case B and in thejournal 7. The iuner end of the shaft i is furnished at the foot of thecrotch S with a go weight or hammer and a coil-spring, 6. Then it isdesired to call, the lever or crank o is pulled forward and let go, whenthe spring` 6 causes the hammer 5 to fiy backward, so the forked end 8of the shaft fi will stride the wire D and strike the enlargement Y onthe wire D heavily, as is shown in the dotted lines in Fig. 5. The shockthus produced will cause the wire D to vibrate its entire length withsuch force as to throw forward the weight or tappet c in the instrumentat the opposite end and touch off the alarm and ring the bell P.

The device for iouching off the alarm or call-hell P is as follows: n'is a post, having its lower end fastened to the partition i; aboutcentral in the case, and having a journal at its upper end, bearing thelower end of the upright lever c, in which journal the lever o partiallyrotates hackward and forward easily. The upright lever e stands in thejournal on the upper end of the post a' in a nearly upright position, asshown in Figs. 4 and so that the weight c on its upper end will restlightly against the end of the wire D at the front of the diaphragm a.Its lower end is bent in the form shown in Fig. 4, terminatin g in apresser-foot, m.

a' is a spring attached to the inner side of the case B, and supportingat its outer end the pallet r, and holding the rod x', which supportsthe knocker w of the alarm-hell.

VVhen a shock is given or imparted to the opposite end of the wire D itwill throw the weight c and lever c forward so the presserfoot willpress down on the pallet which lowers the rod m' and sets free the alarmR by lowering the knocker w. The alarm runs and rin gs the bell P untilthe alarm machinery runs down. The rod x' has a long hook on its lowelIend, inclosing` the knocker-lever, so the knockerlever will not becomedisengaged from it while in motion.

The alarm machinery R is of the ordinary pattern used in a clock, and isfastened in the lower part of the case at one side, as shown in Fig. 4..The long shaft x and the crank n are for the purpose of winding it up.

The set-serew g, Fig. 5, is used to regulate the position of the post n'and lever c, to cause the weight o to rest in such a manner against theend of the wire D that the least shock will send it forward.

VVhen conversation. is being had the crank o is always to be pulledforward and held behind the stop r, so as to disengage the forked end 8of the shaft i from the wire D, as is shown in Fig. 5, as any contact ofa hard substance with the wire D will destroy its vibration; also, whileconversing the weight c and lever c are thrown forward, as is shown bythe dotted lines in Fig. 5, thus leaving the wire D entirely free tovibrate.

Then the instrument is left set for any future conversation the crank 0should be pulled forward and placed behind the stop r, as stated, andthe lever c and weight c placed in the position shown in Fig. 5, withthe weight c against the end of the wire D and the crank a turnedforward to wind up the alarm maehinery B. It is then ready to receivethe alarm by a shock from the other end. As the alarm machinery in thiscase is the same as that used in a clock, and having no substantiallydifferent features, and as it alone and by itself forms 110 part of myinvention, l. do not describe its details further.

As the wire D can touch no hard substauce between the diaphragms, Isuspend the wire D in the mauner shown in Fig. 3.

b is a piece of rubber, having a central hole for the wire D to passthrough, and a slit from the center hole to the periphery, as is shownin Fig. 2, which slit permits the insertion of the wire D. These rubberinsulators are encircled by a wire clasp, (shown at S',) or by a cord,(shown at z, Fig. 3,) the upper ends of which are attached to a pole orbuilding, as

the case maybe, by the screw-eyes S. By this arrangement the wire D doesnot come in contact with any hard substanee, and the joints made byhinging into the serew-eyes S preserves the Vibration of the wire.

The opening in the front of the case B, Fig. 1, marked Ru1es,is for thepurpose of holding the printed rules for Operating the instruments.

I am aware that a wire has been used between two diaphragms to conveysounds, but not with such a perforated partition to support thediaphragms, or in connection with the call and alarm devices shown.

Without the weight c pressing against the end of the wire D the saidwire will sing, in consequence of the wind coming Lin contact with it,quite similar to the cleoliand harp. To prevent this singing or sound ofthe wire D, the weight c serves a double purpose of calling andsileneing any such noise when the instrument is not in use. This singingmay also be prevented by leaving the forked end S of the shaft t' iucontact with the enlargement Y on the wire D, as shown by the dottedlines in Fig. 5.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows, to wit:

1. The diaphragm a, mounted on the collar 7; and supported by theperforated partition E of the case B, in combination with the wire D,for the purpose set forth.

2. The combination and arrangement of the shaft i, crank o, spring 6,weight 5, fork S, and enlargement Y on the wire D, for the purpose setforth.

3. The combination and arrangement of the weight c, lever c, foot m,post a', pallet l, spring a', rod w', alarm R, knocker w, hell P, andset-screw g, all attached to and contained within the case B, as and forthe purpose set forth.

4. The case B, having the partitions E lv and containing the diaphragm(1,, mounted on the collar k, the levcr c, weight c, presser-foot m,spring ct', hooked rod x', alarm R, shaft x, shaft i, Spring G, journal7, weight 5, fork 8, set-screw g, wire D, enlargement Y, and hav- IOC)IIO

IIS

IZO

ing the external oranks, o and n, hell P, and month-piece K,l and hoseA, all in combination with each other, and arranged to operate in themanner and for the purpose set forth.

5. The combination and arrangement of the post n', lever e, andset-sorew g, for the purpose set forth.

6. The Weight c and fork 8, in combination with the Wire D, for thepnrpose of preventing the singing sound of the wire D, as set io forth.

WILLIAM J. HUTGHINS.

Witnesses THoS. H. HUTOHINS, JoHN MCNIFF.

